Taxonomic notes on Diplacus (Phrymaceae)

Publication Type:

Journal Article

Authors:

Guy L. Nesom

Source:

Phytoneuron, Phytoneuron, Issue 66, p.1-8 (2013)

Call Number:

A13NES02IDUS

URL:

http://www.phytoneuron.net/2013Phytoneuron/66PhytoN-SubgDiplacus.pdf

Keywords:

Diplacus, Diplacus cusickii, Diplacus cusickioides, infrageneric taxonomy, Phrymaceae

Abstract:

An update to the infra-generic classification of Diplacusis provided. The genus includes 48 species, only one of which does not occur in the USA, distributed among five sections. Three species are returned here to sectional positions where earlier placed by Thompson (2005): D. parryi and D. torreyi to sect. Eunanus and D. rupicola to sect. Oenoe. Sect. Diplacus is recognized to comprise ten species and two relatively abundant and formally named hybrids. Diplacus rutilus is tentatively maintained at specific rank – it differs from D. longiflorus in its red to red-orange corollas and apparently is endemic to Los Angeles County. Distributions of the species and hybrids of sect. Diplacus in the USA are mapped at county level.